Black and white image with the following printed description: Visit of Secretary Wilbur and party to Black Canyon Damsite. Party at St. Thomas, Nevada.
A Union Pacific Railroad train as a part of the construction for Hoover Dam. The front of the card reads: "First train in railroad pass, Boulder Dam Project, Oakes." Description given with postcard: "SP, LA & SL (UPRR) locomotive 6082 in Railroad Pass. Maybe spreading ballast on track."
Photographer's notes: "Upstream view of Lake Mead near the dam. Decades of evaporation and low water levels have created mineral deposits, which appear as white banding around the reservoir."